Hubbard



(No Model.)

W. P. T. JO'PEi DIE FOR TAPERING SHOVBL MOLDS. No. 263,709. PatentedSept. 5, 1882.

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1 WILLIAM P. T. JOPE, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO HUBBARD,BAKEWEL L & 00., OF SAME PLACE.

DI E FOR TAPERING SHOVEL-MOLDS.

SPECIFICATION forming-part of Letters Patent No. 263,709, datedSeptember 5, 1882.

. Application filed April 24, 1882. (No model.)

To all whom it may-concern: Be it known that I, WILLIAu P. T. JoPE, ofPittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented a new and useful Improvement in Dies for Tapering Shovel-Molds;and I do hereby declare the following to be a full, clear, and exactdescription thereof. Heretofore in the manufacture of shovels it hasbeen customary to draw out thelower end of the blank, or mold, as it istermed in the works, under a pair of slightly-convex ham mer-diesprevious to rolling or plating them out to the proper thickness. Thesehammer- :5 dies operate upon the edges of the blank, and are designed todraw it out into a tapering form. The mold is a short thick rectangulararticle, having a greater longitudinal than lateral diameter, and at oneend it is provided with projections extending from the middle of thesides, which, when plated out, form the straps. It is drawn out underthe hammerdies before mentioned to a rough tapered shape, so that whenrolled or plated by the action of rolls or hammer-dies upon its sides itwill have the general shape and,ontline of the desiredshovel. The edgesare then sheared to the pattern of the shovel, and the blank is finishedup by hardening and polishing it.

The operation heretofore practiced is objectionable in that it is liableto draw the edges down irregularly,sometimes makin gone nearly straight,while the other is much rounded. The result of this is great waste inthe 'final 5 shearing of the blank. Another objection is that theoperation of the dies upon the edges of the mold is to draw the edgesout more than the center, so that there is formed in the end of theblank a sort of cavity or recess, which, when the blank is rolled out,is increased by the stretch of the metal, and requires it to be shearedof such recess or indentation, thus increasing the waste necessitated incutting the shovel toshape.

To enable others skilled in the art to make and use my invention, I willnow describe it by reference to the accompanying drawings, in which-Figure 1 is a view of the mold after the first how the mold is presentedto them.

step of its formation. Fig. 2 is a view alter the second step. Fig. 3 isa view of the mold when ready for the operation of my improved dies.Fig. 4 is a perspective view of my improved dies. Fig. 5 is a side view,showing Fig. 6 is after being operated upon thereby. Fig. 7 is a sideelevation of a die for shaping spades and similar articles.

Like letters of reference indicate like parts in each. 7

The mold is formed of two short thick rectangular pieces of metal, a,united by a thin narrow strip, b, Fig. l. The piece 13 is bent at 'themiddle until the two slabs a are laid upon each other, either with orwithout a center bit of steel between them, whichbit forms the a View ofthe mold cutting-edge of the completed shovel. After this step the moldis in the condition shown in Fig.2. It is then placed under a suitablehammer, and the slabs a a and bit c are formed into one solid thickrectangular body, at. (Shown in Fig. 3.) The strip 1) forms the straps eof the mold, which in its completed state and ready for the operation ofmy improved dies is shown in Fig. 3 by an edge view. A side view isshown in Fig. 5.

I construct the dies by which the mold is tapered as shown in Fig. 4.Here there are two dies,f g. Thelowerdie, g, is secured upon theanvil-block in the usual way, and the up per die, f, is secured in thedrop or hammer. Each of these diesis provided with a taperingserratedjaw, which is of the form to give the desired taper to the edges of themold. These jaws are shown at f 9. They are serrated laterally for thepurpose of biting upon the edges of the mold and preventingits slippingor bein g thrown back against the workman. Where, as in Figs. 4 and 5,the taper of these edges is abrupt there is danger of their forcing backthe mold d, when placed between them, with great force unless someprovision is made for them to bite upon the mold and prevent itsescaping. 'I therefore serrate them as described. It is to be rememberedthat the blow of the hammer f is delivered with great force andrapidity, so thatthe danger from this source would be great if the ratedsurfaces of the lower die, 9. As re-' peated blows of the die f aredelivered upon it it is fed farther in, so that it shall be plated downinto a tapered shape, which is the counterpart of the jaw-cavity, and isshown in Fig.6.

It is apparent that all the molds made in the dies will be of the sameshape, and that when such molds are rolled or plated out to form theshovel they Will draw into substantially the same shape as the molds,whieh,b.eing of about the shape of the proposed shovel, will cause therolled or plated-out blank to require but little shearing to bring it toshape. ln the old way, where, as before stated, the mold was taperedmoneto one side, the work of rolling or plating was rendered very (lifficultin the attempt of the roller to draw the blank into shape. This isentirely obviated by my improvement. By my invention I obtain uniformityof shape, reduce the labor and cost of manufacture, and save material.

The dies shown in Fig. 7 are designed for the manufacture of spades andother tools, such as canal and coal shovels, and all kinds ofdraining-tools having but slight taper. In this form of dieit is notabsolutely necessary that the sides be serrated, as there is much lessdanger of the blank being cast out by the operation of the dies. When,however, the taper is more abrupt this is necessary.

If desired, the meetingfaces of the die-cavity may be drawn to acutting-edge, as indicated by dotted lines at i in Fig. 5,so that whenthe dies meet they will cut otl' any projection or teat which may beformed upon the end of the mold in drawing it down to a tapered shape.

What I claim as my invention, and desire to secure by Letters Patent,is-- l. A pair of dies for tapering shovel-molds, recessed so that whenclosed they form a tapered working-cavity, substantially as and for thepurposes described.

2. A pair of dies for tapering shovel-molds preparatory to rolling orplating, having a tapering-cavity which is laterally serrated,sub-

.s'tantially as and for the purposes described.

3. A pair of dies for tapering shovel-molds preparatory to rolling orplating, having a tapering cavity which is laterally serrated, andprovided with cutting-edges at the inner end of the die-cavity,substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 22d day of April,A. D. 1882.

WILLIAM P. T. JOPE. Witnesses:

T. B. KERR, W. B. Goawnv.

